rm 02
rm 01

arm-linux-gnueabihf-gcc 02rcv.c  -o 02
arm-linux-gnueabihf-gcc 01snd.c  -o 01

arm-linux-gnueabihf-gcc 4-get-type1.c  -o 4-get-type1
arm-linux-gnueabihf-gcc 3-get-type2.c  -o 3-get-type2
arm-linux-gnueabihf-gcc 5-send-type2.c  -o 5-send-type2